DOI: 10.1038/ngeo2469
论文题名: Massive nitrous oxide emissions from the tropical South Pacific Ocean
作者: Arévalo-Martínez D.L. ; Kock A. ; Löscher C.R. ; Schmitz R.A. ; Bange H.W.
刊名: Nature Geoscience
ISSN: 17520894
出版年: 2015
卷: 8, 期: 7 起始页码: 530
结束页码: 533
语种: 英语
英文摘要: Nitrous oxide is a potent greenhouse gas and a key compound in stratospheric ozone depletion. In the ocean, nitrous oxide is produced at intermediate depths through nitrification and denitrification, in particular at low oxygen concentrations. Although a third of natural emissions of nitrous oxide to the atmosphere originate from the ocean, considerable uncertainties in the distribution and magnitude of the emissions still exist. Here we present high-resolution surface measurements and vertical profiles of nitrous oxide that include the highest reported nitrous oxide concentrations in marine surface waters, suggesting that there is a hotspot of nitrous oxide emissions in high-productivity upwelling ecosystems along the Peruvian coast. We estimate that off Peru, the extremely high nitrous oxide supersaturations we observed drive a massive efflux of 0.2-0.9 Tg of nitrogen emitted as nitrous oxide per year, equivalent to 5-22% of previous estimates of global marine nitrous oxide emissions. Nutrient and gene abundance data suggest that coupled nitrification-denitrification in the upper oxygen minimum zone and transport of resulting nitrous oxide to the surface by upwelling lead to the high nitrous oxide concentrations. Our estimate of nitrous oxide emissions from the Peruvian coast surpasses values from similar, highly productive areas. © 2015 Macmillan Publishers Limited. All rights reserved. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/106304
Appears in Collections: 气候减缓与适应 科学计划与规划
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作者单位: Helmholtz Centre for Ocean Research Kiel, Düsternbrooker Weg 20, Kiel, Germany; Institute of Microbiology, Christian Albrechts University of Kiel, Am Botanischen Garten 1-9, Kiel, Germany
Recommended Citation:
Arévalo-Martínez D.L.,Kock A.,Löscher C.R.,et al. Massive nitrous oxide emissions from the tropical South Pacific Ocean[J]. Nature Geoscience,2015-01-01,8(7)